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7.Gravitation
normal

${R_1}$ અને ${R_2}$ ત્રિજયા તથા ${\rho _1}$ અને ${\rho _2}$ ઘનતા ધરાવતા ગ્રહોના ગુરુત્વપ્રવેગનો ગુણોત્તર કેટલો થાય?

A

${g_1}:{g_2} = \frac{{{\rho _1}}}{{R_1^2}}:\frac{{{\rho _2}}}{{R_2^2}}$

B

${g_1}:{g_2} = {R_1}{R_2}:{\rho _1}{\rho _2}$

C

${g_1}:{g_2} = {R_1}{\rho _2}:{R_2}{\rho _1}$

D

${g_1}\,:\,{g_2} = {R_1}{\rho _1}:$${R_2}{\rho _2}$

Solution

$g = \frac{4}{3}\pi \rho GR$

$\therefore {g_1}\,:\,{g_2} = {R_1}{\rho _1}:{R_2}{\rho _2}$.

Standard 11
Physics

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